Engadget - The summer sun supercharged green technology this week as Inhabitat reported that IKEA flipped the switch on a massive 65,000 square foot solar array and designer Markus Kayser unveiled an awesome self-sufficient solar-powered laser cutter. We also spotted a clever off-grid Tropicana billboard that is juiced by oranges, and we learned about a new piezoelectric film that could lead to laptops powered by typing.